CN102509409B - Mobile phone anti-theft and anti-loss alarming method based on Bluetooth technology - Google Patents

Abstract

The invention relates to a mobile phone anti-theft and anti-lost alarm method based on bluetooth technology, comprising establishing a bluetooth wireless connection between the mobile phone and the alarm, setting the alarm environment information value, obtaining the alarm distance threshold value Th, detecting the bluetooth signal strength value RSSI, according to the received Signal strength value RSSI and described alarm environment information value estimate the distance Dis between mobile phone and alarm, when distance Dis exceeds alarm distance threshold value Th, trigger alarm; Alarm distance of the present invention considers environmental factor, makes alarm more accurate, can Set the alarm distance according to the needs of the user. Further, when the maximum transmission distance of the Bluetooth signal is exceeded, the alarm or the mobile phone can automatically detect and trigger the alarm, and can automatically obtain the GPS information of the current mobile phone and send it to the preset mobile phone number at regular intervals. The method of two-way detection of signal strength is further adopted to improve the accuracy of the alarm.

Description

A mobile phone anti-theft and anti-lost alarm method based on bluetooth technology

technical field

The invention relates to a mobile phone anti-theft and anti-lost alarm method based on bluetooth technology.

Background technique

Nowadays, the mobile phone has become an essential device for people's daily life. However, when the mobile phone is stolen or forgotten by oneself, it is a headache, and the loss of important information stored in the mobile phone often brings great harm to the user. Greater loss, so the mobile phone alarm device came into being.

The alarms that appeared on the market in the early days were bound to objects other than mobile phones. Such alarms were large in size and not easy to carry, which would bring great inconvenience to users in use. The alarm device based on bluetooth technology of smaller equipment appeared afterwards, as the Chinese patent that application number is 200620058961 discloses a kind of anti-lost and anti-theft alarm for valuables based on bluetooth technology, which is composed of at least one bluetooth communication module, The alarm module and the DC power supply are composed; the Bluetooth communication module can carry out digital communication with the equipment containing the Bluetooth communication module including the Bluetooth mobile phone, realizing the function of using the Bluetooth technology to realize the alarm of the mobile phone, but the alarm has the following defects: The alarm distance is fixed, and users cannot independently set the alarm distance according to their own needs, which limits the user's use range; the alarm distance does not consider environmental factors, and the alarm effect is not good; the alarm function cannot be implemented when the Bluetooth signal is suddenly interrupted or attenuated; the alarm It is not specifically designed for mobile phones and can be connected to multiple Bluetooth devices, which poses a security risk.

Contents of the invention

In order to solve the above problems, the present invention provides a mobile phone anti-theft and anti-lost alarm method based on bluetooth technology, as shown in Figure 1, including establishing a bluetooth wireless connection between the mobile phone and the alarm, setting the alarm environment information value, obtaining the alarm distance threshold Th, Detect the Bluetooth signal strength value RSSI, estimate the distance Dis between the mobile phone and the alarm according to the received signal strength value RSSI and the alarm environment information value, and trigger an alarm when the distance Dis exceeds the alarm distance threshold Th.

Preferably, the bluetooth wireless connection between the mobile phone and the alarm is established as when the alarm is successfully paired with the mobile phone bluetooth for the first time, the alarm records the globally unique identification UUID of the mobile phone found, and when the alarm searches for a bluetooth device, Only connect the mobile phone with the identification mark.

Preferably, the establishment of the bluetooth wireless connection between the mobile phone and the alarm means that after the alarm and the mobile phone are successfully paired, the serial operation mode SPP connection is adopted between the two, and the established connection is occupied in real time.

Preferably, the obtained alarm distance threshold Th is the maximum alarm distance corresponding to various alarm environment information values obtained in advance according to actual measurement data and simulation, and is stored in a mobile phone or an alarm device. After setting the alarm environment information value, the The maximum alarm distance corresponding to the alarm environment information value is used as the alarm distance threshold Th.

Preferably, the obtaining of the alarm distance threshold Th is to set the alarm distance while setting the alarm environment information value, and use the set alarm distance as the alarm distance threshold Th.

In particular, when the alarm distance set by the user exceeds the maximum transmission distance value of the Bluetooth wireless connection, the maximum transmission distance value of the Bluetooth wireless connection is used to replace the set alarm distance.

Preferably, the obtained alarm distance threshold Th is:

The maximum alarm distance corresponding to various alarm environment information values is obtained in advance according to the measured data and simulation, and stored in the mobile phone or alarm. After setting the alarm environment information value, the maximum alarm distance corresponding to the alarm environment information value is obtained ;

While setting the alarm environment information value, set the alarm distance;

The smaller value of the maximum alarm distance corresponding to the alarm environment information value and the alarm distance is set as the alarm distance threshold Th.

Preferably, the distance Dis between the mobile phone and the alarm is estimated according to the received signal strength value RSSI and the alarm environment information value, specifically:

Dis＝a ₀ +a ₁ RSSI ^-1 +a ₂ RSSI ^-2 +a ₃ RSSI ^-3 ...a _M RSSI ^-M

Among them, a ₀ , a ₁ ...a _M are environment correction parameters, M is a precision parameter, and the value is an integer.

As a preferred embodiment, when the distance Dis exceeds the alarm distance threshold Th, triggering the alarm is the mobile phone judging whether the distance Dis exceeds the alarm distance threshold Th, if exceeded, the mobile phone sends an alarm command to the alarm, and the alarm receives the alarm command Start the alarm.

Preferably, when the mobile phone sends an alarm command to the alarm device, at the same time, it sends an alarm command to itself to start its own alarm, or/and activates the GPS module of the satellite positioning system on the mobile phone to send location information to other set mobile phone numbers.

Preferably, if the alarm device does not receive any instructions from the mobile phone within the predetermined time T, then carry out RSSI detection, estimate the distance Dis between the mobile phone and the alarm device, and judge whether the distance Dis exceeds the maximum transmission distance of Bluetooth, if exceeded, Then send an alarm command to the alarm itself.

As another preferred embodiment, the triggering of the alarm when the distance Dis exceeds the alarm distance threshold Th is that the alarm device judges whether the distance Dis exceeds the alarm distance threshold Th, and if so, the alarm device sends an alarm command to itself to start an alarm.

Preferably, the alarm device sends an alarm command to itself and at the same time sends an alarm command to the mobile phone, and if the mobile phone receives the alarm command, it starts the mobile phone to alarm.

Preferably, if the mobile phone does not receive any instructions from the alarm within the predetermined time T, the bluetooth signal strength value RSSI emitted by the alarm is detected, and the distance between the mobile phone and the alarm is estimated according to the received signal strength value RSSI and the alarm environment information value. distance Dis, and judge whether the distance Dis exceeds the maximum transmission distance of Bluetooth. If it exceeds, the mobile phone sends an alarm command to itself to trigger the mobile phone alarm.

Preferably, when the mobile phone sends an alarm command to itself to trigger the mobile phone alarm, the GPS module of the satellite positioning system on the mobile phone is activated to send location information to other preset mobile phone numbers.

As another preferred embodiment, when the distance Dis exceeds the alarm distance threshold Th, triggering the alarm is that the mobile phone and the alarm simultaneously judge whether the distance Dis exceeds the alarm distance threshold Th, and if it exceeds, then send an alarm command to itself, and at the same time send an alarm command to the other party. Send an alarm command, and start the alarm when receiving its own alarm command and the alarm command sent by the other party.

The alarm distance of the present invention considers environmental factors to make the alarm more accurate, and the alarm distance can be set according to the needs of the user. Further, when the maximum transmission distance of the Bluetooth signal is exceeded, the alarm or the mobile phone can automatically detect and trigger the alarm, and can automatically obtain The GPS information of the current mobile phone satellite positioning system is regularly sent to the preset mobile phone number, and the method of two-way detection of signal strength is further adopted, which improves the accuracy of the alarm compared with the existing technology, and better plays the role of preventing theft and loss of the mobile phone. The alarm device of the present invention is small in size, easy to carry, convenient to put the alarm device and the mobile phone in different positions on the body, and convenient to realize the purpose of anti-theft and anti-lost of the mobile phone.

Description of drawings

Fig. 1 is the schematic flow chart of the mobile phone anti-theft anti-lost alarm method based on bluetooth technology of the present invention;

Fig. 2 is the working model schematic diagram that moves between mobile phone of the present invention and alarm;

Fig. 3 is a schematic diagram of information transmission between the mobile phone and the alarm in Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of information transmission between the mobile phone and the alarm device according to Embodiment 2 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

The invention relates to a mobile phone with a Bluetooth connection module and an alarm with a Bluetooth connection module. The alarms are connected and transmitted through Bluetooth technology. The working model between the mobile phone and the alarm is shown in Figure 1. Further details , The mobile phone may also include a satellite positioning system GPS module.

Example 1

101. Establish a Bluetooth connection between the mobile phone and the alarm

In order to solve the problem that the prior art alarm is not specially designed for mobile phones and is connected with multiple bluetooth devices, there are potential safety hazards,

Preferably, as an implementable mode, the bluetooth wireless connection mode between the mobile phone and the alarm is to use the method of recording the bluetooth address when querying and pairing for the first time, that is, when the alarm is successfully paired with the mobile phone bluetooth for the first time, the alarm records The globally unique identification UUID of the mobile phone is searched, and the alarm device only connects to the mobile phone marked with the identification identification every time it searches for a Bluetooth device.

Preferably, as another kind of implementable mode, the Bluetooth wireless connection mode between the mobile phone and the alarm is after the alarm device and the mobile phone are successfully paired, the SPP connection mode is adopted between the two, and the established connection is occupied in real time to prevent The access of other Bluetooth devices during the information transmission process between the two.

Through the above method, the Bluetooth connection established between the mobile phone and the alarm is a one-to-one Bluetooth wireless connection, which solves the problem that the alarm in the prior art is not specially designed for mobile phones and can be connected with multiple Bluetooth devices, which has potential safety hazards.

102. Set the alarm environment information value on the mobile phone, and obtain the alarm distance threshold Th, as shown in ① in Figure 3;

The maximum alarm distance corresponding to various alarm environment information values is obtained in advance according to the measured data and simulation, and stored in the mobile phone or/and the alarm device. When the alarm environment information value is set on the mobile phone, the alarm environment information value will be obtained The corresponding maximum alarm distance is taken as the alarm distance threshold Th; this program obtains the maximum alarm distance corresponding to various alarm environment information values through a large number of tests on signal strength values in different environments, and displays them in the mobile phone or/and the alarm After setting the alarm environment information value, the maximum alarm distance corresponding to the alarm environment information value can be obtained through the corresponding relationship, so that different alarm distances can be selected according to the environment where the device is located, and the alarm accuracy can be improved.

Preferably, when setting the alarm environment information value, input the alarm distance, and use the input alarm distance as the alarm distance threshold Th;

In particular, when the user's input alarm distance exceeds the maximum transmission distance value of the Bluetooth wireless connection, replace the input alarm distance with the maximum transmission distance value of the Bluetooth wireless connection;

Preferably, considering the above three methods comprehensively, the smaller value of the input alarm distance and the maximum alarm distance corresponding to the alarm environment information value is used as the alarm distance threshold Th.

103. The mobile phone detects the Bluetooth signal strength value RSSI emitted by the alarm, and estimates the distance Dis between the mobile phone and the alarm according to the received signal strength value RSSI and the alarm environment information value, as shown in ② in Figure 3.

The detection of the Bluetooth signal strength value RSSI is a well-known technology in the art and will not be described in detail.

104. The mobile phone judges whether the distance Dis exceeds the alarm distance threshold Th. If it exceeds, the mobile phone sends an alarm command to the alarm device, as shown in ③ in Figure 3, and the alarm starts to alarm after receiving the alarm command, as shown in Figure 3 ④.

Preferably, when the mobile phone sends an alarm command to the alarm device, at the same time, it sends an alarm command to itself, as shown in ⑤ in Figure 3, and starts its own alarm.

As a possible situation, the signal between the mobile phone and the alarm is suddenly interrupted or blocked, so that the mobile phone or the alarm detects that the Bluetooth signal strength value RSSI of the other party is particularly small. At this time, according to the received signal strength value RSSI and the alarm environment The distance Dis between the mobile phone and the alarm obtained by the information value is particularly large, and it must exceed the alarm distance threshold Th. However, due to the sudden interruption or shielding of the signal between the mobile phone and the alarm, the two cannot communicate at all. Sending an alarm command to the alarm will definitely fail. If the alarm cannot receive the alarm command, it will not be able to start the alarm, and it will not have a warning effect;

As an optional implementation, if the alarm device does not receive any instructions from the mobile phone terminal within the predetermined time T, the alarm device starts its own detection, that is, performs RSSI detection, estimates the distance Dis between the mobile phone and the alarm device, and judges Whether the distance Dis exceeds the maximum transmission distance of Bluetooth, if so, an alarm command is sent to the alarm itself, and the predetermined time T is an experimental value.

As another optional implementation, the mobile phone sends an alarm command to the alarm, and at the same time activates the GPS module on the mobile phone to send location information to other preset mobile phone numbers.

This implementation provides a method of inputting information on the mobile phone, performing signal detection and judgment on the mobile phone, and starting the mobile phone or/and the alarm to alarm when the alarm threshold is exceeded.

Example 2

201. The implementation steps are the same as those in 101;

202. The implementation steps are the same as 102, as shown in ① in Figure 4;

203. The mobile phone sends the alarm environment information value and the alarm distance threshold value Th to the alarm device through the Bluetooth connection, as shown in Figure 4 (2), the alarm device detects the Bluetooth signal strength value RSSI transmitted by the mobile phone, and according to the received signal strength value RSSI and alarm The environmental information value estimates the distance Dis between the mobile phone and the alarm, as shown in ③ in Figure 4;

The detection of the Bluetooth signal strength value RSSI is a well-known technology in the art, and will not be described in detail here.

204. When the distance Dis exceeds the alarm distance threshold Th, an alarm is triggered, specifically including:

The alarm estimates the distance Dis between the alarm and the mobile phone according to the detected RSSI and the alarm environment information value, and judges whether the distance Dis exceeds the alarm distance threshold Th. If it exceeds, the alarm sends an alarm command to itself, as shown in Figure 4 ④, trigger self-alarm.

Preferably, the alarm device sends an alarm command to itself and at the same time sends an alarm command to the mobile phone, as shown in ⑤ in Figure 4. If the mobile phone receives the alarm command, it starts the mobile phone alarm, as shown in ⑥ in Figure 4

As a possible situation, the signal between the mobile phone and the alarm is suddenly interrupted or blocked, so that the mobile phone or the alarm detects that the Bluetooth signal strength value RSSI of the other party is particularly small. At this time, according to the received signal strength value RSSI and the alarm environment The distance Dis between the mobile phone and the alarm obtained from the information value is particularly large, and it must exceed the alarm distance threshold Th. If the device sends an alarm command to the mobile phone, it will definitely fail. If the mobile phone cannot receive the alarm command, it cannot start the alarm, and the mobile phone cannot function as a warning;

As a possible implementation, if the mobile phone does not receive any instructions from the alarm device within the predetermined time T, then detect the bluetooth signal strength value RSSI emitted by the alarm device, and estimate the mobile phone and alarm signal according to the received signal strength value RSSI and the alarm environment information value. The distance Dis between devices, and judge whether the distance Dis exceeds the maximum transmission distance of Bluetooth, if it exceeds, the mobile phone sends an alarm command to itself, triggering the mobile phone alarm.

Preferably, when the mobile phone sends an alarm command to itself to trigger the mobile phone alarm, the GPS module is activated to send location information to other preset mobile phone numbers.

In this implementation, information is input on the mobile phone, signal detection and judgment are performed on the alarm, and when the alarm threshold is exceeded, the mobile phone or/and the alarm are activated to alarm.

Example 3

301. The implementation steps are the same as 101;

302. Set the alarm environment information value on the alarm, and obtain the alarm distance threshold Th;

The difference between this step and step 102 is that the alarm environment information value is set in the alarm to obtain the alarm distance threshold Th, and the specific method for obtaining the alarm distance threshold Th is the same as step 102.

303. The alarm device detects the Bluetooth signal strength value RSSI emitted by the mobile phone, and estimates the distance Dis between the mobile phone and the alarm device according to the received signal strength value RSSI and the alarm environment information value;

304, the same as step 204.

In this implementation, information is input on the alarm, signal detection and judgment are performed on the alarm, and when the alarm threshold is exceeded, the mobile phone or/and the alarm are activated to alarm.

Example 4

401. The implementation steps are the same as 101;

402, the same implementation steps as 302;

403. The alarm sends the alarm environment information value and the alarm distance threshold Th to the mobile phone through the Bluetooth connection, and the mobile phone detects the Bluetooth signal strength value RSSI emitted by the alarm, and estimates the mobile phone and the alarm according to the received signal strength value RSSI and the alarm environment information value. The distance Dis between the devices:

404, the same as step 104;

In this implementation, information is input on the alarm, signal detection and judgment are performed on the mobile phone, and when the alarm threshold is exceeded, the mobile phone or/and the alarm are activated to alarm.

Example 5

501. The implementation steps are the same as 101;

502, the same implementation steps as 102 or 302;

503. The mobile phone or the alarm sends the alarm environment information value and the alarm distance threshold Th to the other party through the Bluetooth connection, detects the Bluetooth signal strength value RSSI emitted by the other party, and estimates the distance between the mobile phone and the alarm according to the detected RSSI and the alarm environment information value. The distance Dis,

504. Determine whether the distance Dis exceeds the alarm distance threshold Th, and if so, send an alarm command to itself and at the same time send an alarm command to the other party, and start an alarm when receiving the alarm command from itself and the alarm command from the other party.

Through the above scheme, if one end of the mobile phone or the alarm detects that the distance Dis exceeds the alarm distance threshold Th, it will send an alarm command to itself and the other party but will not trigger the alarm. Only after receiving the alarm command from itself and the alarm command from the other party , the alarm is activated. Using the function of simultaneous detection of mobile phones and alarms can reduce the probability of false alarms and improve accuracy.

Preferably, the mobile phone estimates the distance Dis between the mobile phone and the alarm according to the detected RSSI and the alarm environment information value, and judges whether the distance Dis is within the maximum effective range within the maximum transmission distance of Bluetooth. Mobile phone number to send location information.

In this implementation, information is input on the mobile phone or the alarm, signal detection and judgment are performed on the mobile phone and the alarm, and when the alarm threshold is exceeded, the mobile phone and the alarm are started to alarm.

At present, the method for obtaining the RSSI of the bluetooth alarm in the prior art adopts the method of real-time detection of the alarm, and the real-time detection increases the power consumption of the alarm. In the present invention, when the mobile phone or the alarm can not receive the relevant information of the other party for a period of time, the detection program can be started by itself, that is, if the mobile phone or the alarm does not receive any instructions from the other party within the predetermined time T, then the RSSI will be checked. Detect and estimate the distance to the other party. If the distance is exceeded, an alarm will be triggered if the distance is exceeded, thereby greatly reducing power consumption. Further, the difference between the present invention and the prior art is that after the alarm device is connected to the mobile phone Bluetooth, the mobile phone performs a series of operations by sending instructions, which is greatly different from the prior art alarm device after it is connected to the mobile phone. The alarm is detected by the alarm according to the preset alarm distance, and this system can effectively reduce the power consumption of the alarm. In addition, the advantage of the bluetooth alarm is that it can intelligently set the alarm distance according to the environmental variables.

The present invention estimates the distance Dis between the mobile phone and the alarm according to the received signal strength value RSSI and the alarm environment information value, specifically:

Dis＝a ₀ +a ₁ RSSI ^-1 +a ₂ RSSI ^-2 +a ₃ RSSI ^-3 ...a _M RSSI ^-M

Among them, a ₀ , a ₁ ...a _M are environment correction parameters, M is a precision parameter, and the value is an integer.

A large amount of actual data obtained through measurement in different environments and linear least squares fitting are performed to obtain environmental correction parameters a ₀ , a ₁ ... a _M in different environments. Theoretically, the larger the value of M, the better the accuracy It will also increase relatively, but the accuracy increase effect is not too obvious, and it will increase the fitting complexity. Considering the accuracy and complexity comprehensively, the preferred M value is 4, and the above formula reflects the distance between the mobile phone of the present invention and the alarm The relationship between Dis and received signal strength value RSSI and alarm environment.

The alarm distance of the present invention considers environmental factors to make the alarm more accurate, and the alarm distance can be set according to the needs of the user. Further, when the maximum transmission distance of the Bluetooth signal is exceeded, the alarm or the mobile phone can automatically detect and trigger the alarm, and can automatically obtain The GPS information of the current mobile phone is regularly sent to the preset mobile phone number, and the method of two-way detection of signal strength is further adopted, which improves the accuracy of the alarm compared with the existing technology, and better plays the role of preventing theft and loss of the mobile phone. The alarm device of the present invention is small in size, easy to carry, convenient to put the alarm device and the mobile phone in different positions on the body, and convenient to realize the purpose of anti-theft and anti-lost of the mobile phone.

In addition, it is obvious to those skilled in the art that the anti-theft and anti-loss of the mobile phone described in the present invention is only an example, and does not mean that the present invention is limited to the purpose of realizing the anti-theft and anti-loss of the mobile phone. Obviously, other similar purposes can also be achieved through the solution of the present invention. All limitations cannot be listed, but all should be included within the protection scope of the present invention.

The implementation modes or examples of the present invention further describe the purpose, technical solutions and advantages of the present invention in detail. It should be understood that the above implementation modes or examples are only preferred implementation modes of the present invention and are not intended To limit the present invention, any modification, equivalent replacement, improvement, etc. made to the present invention within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (12)

1. the anti-loss alarming method of the antitheft mobile phone based on Bluetooth technology, it is characterized in that, comprise that setting up mobile phone is connected with the blue teeth wireless of alarm, warning environmental information value is set, obtain alarm distance threshold value Th, detect Bluetooth signal intensity level RSSI, estimate the distance B is between mobile phone and alarm according to received signal strength value RSSI and described warning environmental information value, in the time that distance B is exceedes alarm distance threshold value Th, trigger alarm;

Described acquisition alarm distance threshold value Th is: obtain various warning environmental informations according to measured data and emulation in advance and be worth corresponding maximum alarm distance, and be stored in mobile phone or alarm, when arranging after warning environmental information value, obtain this warning environmental information and be worth corresponding maximum alarm distance; When warning environmental information value is set, alarm distance is set; To smaller value that alarm distance is worth corresponding maximum alarm distance with this warning environmental information be set as alarm distance threshold value Th.

2. method as claimed in claim 1, it is characterized in that, the described blue teeth wireless of setting up mobile phone and alarm is connected in the time of alarm and Bluetooth of mobile phone successful matching first, the unique identification marking UUID in the whole world of this mobile phone that alarm record searching arrives, when alarm is found bluetooth equipment at every turn, only connect the mobile phone of this identification marking mark.

3. method as claimed in claim 1, is characterized in that, the described blue teeth wireless of setting up mobile phone and alarm is connected to after alarm and mobile phone successful matching, adopts serial operation Mode S PP connected mode between the two, occupies in real time the connection of foundation.

4. method as claimed in claim 1, is characterized in that, describedly estimates the distance B is between mobile phone and alarm according to received signal strength value RSSI and warning environmental information value, is specially:

Dis=a ₀+a ₁RSSI ^-1+a ₂RSSI ^-2+a ₃RSSI ^-3...a _MRSSI ^-M

Wherein, a ₀, a ₁... a _mfor environmental correction parameter, M is precision parameter, and value is integer.

5. method as described in as arbitrary in claim 1-4, it is characterized in that, described in the time that distance B is exceedes alarm distance threshold value Th trigger alarm be whether mobile phone judging distance Dis exceedes alarm distance threshold value Th, if exceed, mobile phone sends alarm command to alarm, and alarm receives that alarm command starts warning.

6. method as claimed in claim 5, it is characterized in that, mobile phone sends alarm command simultaneously to alarm, starts self warning to self sending alarm command, or/and the Global Positioning System module on startup mobile phone sends positional information to other set phone numbers.

7. method as claimed in claim 5, it is characterized in that, if alarm is not received any instruction of mobile phone in schedule time T, carry out the detection of RSSI, estimate the distance B is between mobile phone and alarm, and whether judging distance Dis exceed bluetooth maximum transmission distance, if exceed, send alarm command to alarm self.

8. method as described in as arbitrary in claim 1-4, it is characterized in that, described in the time that distance B is exceedes alarm distance threshold value Th trigger alarm be whether alarm judging distance Dis exceedes alarm distance threshold value Th, if exceed, alarm sends alarm command to self, starts and reports to the police.

9. method as claimed in claim 8, is characterized in that, alarm, to self sending alarm command simultaneously, sends alarm command to mobile phone, if mobile phone is received alarm command, starts mobile phone alarm.

10. method as claimed in claim 9, it is characterized in that, if mobile phone is not received any instruction of alarm in schedule time T, the Bluetooth signal intensity level RSSI of detection alarm device transmitting, estimate the distance B is between mobile phone and alarm according to received signal strength value RSSI and warning environmental information value, and whether judging distance Dis exceed bluetooth maximum transmission distance, if exceed, mobile phone sends alarm command to self, triggers mobile phone alarm.

11. methods as claimed in claim 10, is characterized in that, send alarm command at mobile phone to self, trigger mobile phone alarm simultaneously, start the Global Positioning System module on mobile phone, send positional informations to other phone numbers that set in advance.

12. as arbitrary in claim 1-4 as described in method, it is characterized in that, described in the time that distance B is exceedes alarm distance threshold value Th trigger alarm be mobile phone and alarm simultaneously judging distance Dis whether exceed alarm distance threshold value Th, if exceed, send alarm command to self, simultaneously send alarm command to the other side, in the time receiving the alarm command that self alarm command and the other side send, start and report to the police.

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